Safety-switch construction for railways



May 18 1926. 1,585,537

J. a. DAVIS SAFETY SWITCH CONSTRUCTION FOR RAILWAYS Filed Jan. 21, 1925Fa 0Z6 MENTOR WITNESS: ATTORNEY Patented May 18, 19 26.

UNITED STATES JOHN B. DAVIS, 03 WHEELING, VJES'I VIRGINIA.

SAFETY-SWITCH CONSTRUCTION FOR RAILWAYS.

Application filed January The object of my invention is the provision ofa simple, easily adjusted and strong safety switch construction,calculated to prevent derailment when a train is passing the switch.

The invention will be fully understood from the following descriptionand claim when the same is read in connection with the drawings,accompanying and forming part of this specification, in which Figure 1is a plan View of a switch embodying the preferred form of my invention.

Figure 2 is an enlarged plan showing my novel safety construction setfor a clear main track.

Figure 3 is a of Figure 2.

Figure 4 is an enlarged diametrical section through the signal lampstand.

Similar numerals of reference designate corresponding parts in all ofthe views of the drawings.

I show in Figure 1 main line track rails 1 and 2, switch rails 3 and 4leading into a' turnout 5, a transverse connection 6 between the switchrails 3 and 4 and a rotary member 7, and an appropriate handle 8 on saidrotary member for turning the same about its axis and thereby adjustingthe switch rails. I also show a lamp stand 8 in which is journaled anupright rock shaft 9, equipped with a signal lamp 10 and also equippedwith a rotary disk 11, connected through a rod 12 with the said rotarymemher 7 Manifestly, when the member 7 is turned about its axis toadjust the switch rails 3 and 4, the signal lamp will be turned toindicate the state of the switch and the disk 11 will also be turned,the latter for the movement of the pivoted frog point 12, comprised inmy novel safety construction, the said point 12 being pivoted at 13, andbeing connected by a rod 14 with the said disk 11.

The point 12 is shown in cross section n Figure 3, and by reference tosaid figure it will be understood that the point 12 is provided with awide base 15 having rounded edges; also, that the rod 14: is connectedto the point 12- through the medium of a screw 16, threaded into thebase 15 and pivotally connected at 17 to the rod 14.

In addition to the point 12 characterized as described, my novel safetyconstruct-ion includes a base plate 18, spiked at 19 to cross section online .--o

21, 1925. serial No. 3,860.

cross ties 20 and a V-shaped frog 21 riveted or otherwise connected at22 in a fixed manner to and .on the plate 18. The arms of the frog 21adjacent to the heels of the rails 3 and 4; have their opposed sidesrecessed as designated by 23 and best shown in Figure 3, each recessincluding a lower undercut portion 24; adapted to receive one side ofthe frog point base 15 with a view to preventing casual upward movementof said point 12 when the same is positioned against either of the saidarms. Manifestly, when the point 12 is arranged as shown in Figure 2, acontinuous main truck rail will be afforded which by cooperation withthe flanges of the wheels of a passingtrain will preclude derailment ofthe train at the frog. Again, when the point 12 is moved to the positionopposite to that shown in Figure 2, a continuous rail and a continuousengagement for the flanges of the wheels of a train will be affordedbetween the switch rail 3 and the portion of the frog 21 at the right of-Figure 2. Notwithstanding the practical advantages of my novelconstruction, it will be apparent that the construction is simple andinexpensive; also, that when the point 12 is positioned against eitherof the recessed frog arms, the point 12 will not only be held againstupward movement by the frog arm, but will be braced and reinforcedagainst lateral movement by said frog arms.

In the preferred embodiment of my invention best shown in Figure 2, therecesses 23 are formed This manifestly contributes to the strength anddurability of the frog and assures strong ln'acing of the point 12 inboth positions of the same.

I have specifically described the preferred embodiment of my inventionin order to impart an exact. understanding of said embodiment. I do notdesire, however, to confine myself to the specific description herein,my novel invention being defined by my appended claim within the scopeof which changes may be made without depart 111;; from my invention.

Having described my invention, what I claim and desire to secure byLetters-Patent, is

In a railway construction, the combination with main track rails,turnout rails and movable switch rails, of a plate fixed under thecontinuous portions of the main track,

by offsetting the frog arms turnout and switch rails, a frog fixed Withrespect to said plate and having divergent arms alined with the heelportions of the switch rails and also having recesses in the opposedsides of said arms and undercut chambers in communication with saidrecesses, and a. frog point pivoted to said frog and movable in thespace between the recessed arms thereof and having a comparatively Widebase the edge portions of which are adapted to enter the undercutchambers in communication with the recesses oi the arms, for the purposeset forth.

In testimony whereof I aflix ture.

my signa- JOHN B. DAVIS.

